中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

16 records (took 0.023 seconds)

    SIGNAL RECEIVING METHOD FOR COMMUNICATION SYSTEM OF MIXED RATE
    1.
    发明专利
    SIGNAL RECEIVING METHOD FOR COMMUNICATION SYSTEM OF MIXED RATE 失效

    公开(公告)号：JP2000138652A

    公开(公告)日：2000-05-16

    申请号：JP23191699

    申请日：1999-08-18

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GITLIN RICHARD DENNIS ,  HUANG HOWARD C ,  MAILAENDER LAURENCE EUGENE ,  VALENZUELA REINALDO A

    IPC: H03H17/02 ,  H04B1/10 ,  H04B1/7107 ,  H04B7/005 ,  H04J3/16 ,  H04L29/08 ,  H04J13/00

    Abstract: PROBLEM TO BE SOLVED: To efficiently increase a system capacity by identifying a high-rate user and reducing the influence of interference only for the high-rate user. SOLUTION: A receiver 400 efficiently gets back a capacity occupied by n-number of high power users by combining an antenna array algorithm 430 and a multi-user detecting algorithm 420. Signals from k-number of users in all are received by antennas 410 to 411. Among the k-number of users, n-number of (k>n) users are the high-rate users and the other (k-n) users are low-rate users. An antenna array algorithm 430, a multi-user detecting algorithm 420 or both of them are applied to only the high-rate users. Namely, concerning the algorithm 430, only ones corresponding to the high-rate user among θ1 to θn are made null and concerning a multi user detecting algorithm 420, only ones corresponding to the high-rate user among signature sequences s1 to sn are utilized.

    COMMUNICATION SYSTEM FOR EFFICIENTLY ROUTING DIGITAL INFORMATION, AND METHOD THEREFOR
    2.
    发明专利
    COMMUNICATION SYSTEM FOR EFFICIENTLY ROUTING DIGITAL INFORMATION, AND METHOD THEREFOR 失效

    公开(公告)号：JPH11168512A

    公开(公告)日：1999-06-22

    申请号：JP25384598

    申请日：1998-09-08

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DUNCAN THOMAS ,  GITLIN RICHARD DENNIS ,  LAPORTA THOMAS F ,  MURAKAMI KAZUTAKA ,  SABNANI KRISHAN KUMAR ,  SAWKAR ANIL S ,  SMITH DAVID E

    IPC: H04M3/00 ,  H04B7/26 ,  H04L12/66 ,  H04Q3/00 ,  H04W88/18 ,  H04L12/28 ,  H04L12/56

    Abstract: PROBLEM TO BE SOLVED: To efficiently use a system band without impairing the quality of a sound signal by converting digital information emitted from a mobile object communication network at a first data rate into a second data rate required in a position where an ATM exchange is connected to a public switched network for the first time. SOLUTION: A mobile terminal 10 calls a cable system telephone set S1 in the public switched network 200. The signal of a base station 20 having the best S/N is selected by a frame selector 120 among the signals of plural base stations receiving digital data of the bit rate of 8 kbps in the mobile terminal 10. A mobile object telephone switching station 100 becomes an initial connection procedure mode. When a line 515 which can directly connected to the public switched network 200 exists, a vocoder 130 converts the bit rate from 8k to 64 kbps from the mobile terminal 10 and transmits it. When a connection opposite party is the ATM exchange 150, a connection procedure is advanced with 8 kbps as it is and the vocoder 153 of the final ATM exchange 150-N executes the conversion of 8 k to 64 kbps.

    WIRELESS STATION SET
    3.
    发明专利
    WIRELESS STATION SET 失效

    公开(公告)号：JPH11331068A

    公开(公告)日：1999-11-30

    申请号：JP32558198

    申请日：1998-11-16

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GITLIN RICHARD DENNIS ,  KASTURIA SANJAY ,  MUKHERJEE SAYANDEV

    IPC: H04B1/38 ,  H04B7/26 ,  H04M1/60 ,  H04M1/725 ,  H04M3/56

    Abstract: PROBLEM TO BE SOLVED: To prevent the background noise picked up in conference service from being transmitted to another conference participant by outputting a prescribed signal to a base station, which receives a control message generated in response to a muting request, in place of a signal received from a wireless station later. SOLUTION: When a user is to operate a mute button at the wireless station, the wireless station reports such a state to the base station. The base station uses the prescribed signal such as a signal expressing silence, for example, in place of the signal received during channel/time slot allocated to the muted wireless station. Namely, when the control message shows the start of a mute state, a channel decoder 430 at the base station sets a bad frame indicator(BFI) to a prescribed value and supplies the value to a voice decoder 420. Then, the voice decoder 420 is instructed to output the decoded voice characterizing silence to a transcoder 410.

    4.
    发明专利
    未知

    公开(公告)号：BR9903622A

    公开(公告)日：2000-09-05

    申请号：BR9903622

    申请日：1999-08-12

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GITLIN RICHARD DENNIS ,  MAILAENDER LAWRENCE EUGENE ,  VALENZUELA REINALDO A ,  HUANG HOWARD C

    IPC: H03H17/02 ,  H04B1/10 ,  H04B1/7107 ,  H04B7/005 ,  H04J3/16 ,  H04L29/08 ,  H04B7/08 ,  H04B7/216

    Abstract: A method and apparatus for increasing system capacity in a mixed-rate wireless communication are disclosed. Improvements are obtained using multiuser detection or antenna array processing techniques or both to explicitly cancel or attenuate only the high power users. Multiuser detection may be combined with antenna array processing to recover capacity appropriated by the high-power users. By mitigating the interference effects of only the high-powered users, the computational burden is manageable. An antenna array algorithm or a multiuser detection algorithm or both, are applied only to n high rate users (n

    6.
    发明专利
    未知

    公开(公告)号：DE69928357D1

    公开(公告)日：2005-12-22

    申请号：DE69928357

    申请日：1999-07-26

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： AHO ALFRED VAINO ,  GITLIN RICHARD DENNIS ,  RAMJEE RAMACHANDRAN ,  WOO THOMAS YAT CHUNG

    IPC: H04L29/06 ,  H04B7/26 ,  H04L12/28 ,  H04L29/08 ,  H04W36/14 ,  H04W76/04 ,  H04W88/06

    Abstract: In a method of effectuating a change in the operation of a portable communication device such as a laptop or palmtop computer, a personal digital assistant (PDA), or a cellular telephone the device can communicate with a remote host or server using one of two or more different communication arrangements. Various signals indicative of the environment in which the device is operating are monitored, to anticipate or predict a change or transition from one communication arrangement to the other. If the change is determined to be both imminent and significant, the operation change is effected substantially simultaneously, by changing parameters in the transport and/or application protocol layer in the device.

    POWER CONTROL AND CELL SITE LOCATION TECHNIQUE FOR CDMA SYSTEMS WITH HIERARCHICAL ARCHITECTURE
    9.
    发明专利
    POWER CONTROL AND CELL SITE LOCATION TECHNIQUE FOR CDMA SYSTEMS WITH HIERARCHICAL ARCHITECTURE 未知

    公开(公告)号：CA2308902C

    公开(公告)日：2003-12-02

    申请号：CA2308902

    申请日：2000-05-19

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： HUANG HOWARD C ,  KRISHNAMOORTHY RAJEEV ,  GITLIN RICHARD DENNIS ,  VALENZUELA REINALDO A

    IPC: H04B7/005 ,  H04W16/06 ,  H04W16/32 ,  H04W52/34 ,  H04Q7/36

    Abstract: Multiple microcell base stations are located within a macrocell having a single macrocell base station in an hierarchical architecture, and microcell users (.mu.-users) and macrocell users (M-users) communicate respectively with the .mu.-base and the M-base using the same frequency band, by appropriately (a) selecting the ratio of the radius r of each .mu. cell and the average distance d from the M-base (r and d are measured by the "radio distance", which includes the effects of shadowing), and (b) controlling the power level with which uplink (mobile to base) and downlink (base to mobile) messages are communicated. Typically, .mu.-cell size and location are chosen such that d/r > 10. With respect to uplink communications, the transmit powers of the .mu. -users in a .mu.-cell are controlled so that the total received power at the nearest M-base is equivalent to the received power from C M-users, where C is usually set to unity. As a result, the M-cell basically loses C users worth of capacity, but the total number of users is increased by virtue of the additional .mu.-users. With respect to downlink communications, as long as the microbase and the macrobase are coordinated systems, the .mu.-base transmit power is controlled so that at the point of handoff between a .mu.-base and M-base,the received power at a user from the two bases is equivalent, and the received power at the bases from this user is also equivalent. With this arrangement, the .mu.-base transmit power is increased as r grows and d decreases in order for this balance to occur. Where the M-base and .mu.-base have no knowledge of each other and handoffs are not allowed between the two base types, a family of I/Q short codes which are quasi-orthogonal to the existing short (pilot) codes are generated, and these codes are used to distinguish between the M-base and .mu.-base signals.

Patent Agency Ranking